Well first I have a 2003 H2 Hummer 123,000 miles.

I am having a problem with a lot of stuff here. I get the "solid"security light on at the same time I get ABS, break light and t/c light and a lot of dinging. When the dinging happens sometimes it also says unknown driver and the charge gauge will drop to nothing, this will last for a bit. Then when the message says driver 1 the charge gauge reads normal. Sometimes the ABS, break, and t/c light will go off. It'* all very random they come on for a second or could stay on for 20 minutes.The things i know so far is that the charge gauge and the unknown driver issue are tide together and when i get unknown driver i show no charge and when it says driver one it shows normal charge.

If the security light does not go on for a bit after starting the car the radio amp will power on but once the security light comes on the amp shuts off, radio works but with no sound. When security light is on, but amp will not turn back on if the security light goes out... it'* a one time deal.
also some times after shutting off the car pull the key out and open that door the radio will stay on, it some times shuts off after a fer min or can take awhile for the radio to shut off. it'* ;ike it does not see the door is open.

Here is what i have checked so far:
battery reads 12.8 volts not running, it does not have a draw ether.
when running i get 14.7 volts constant at the battery. whether the gauge on dash says charge or no charge i am still getting 14.7. but the car runs like the battery is going dead. I really see it when the dash reads no charge.

I have re-set the BCM couple times and works fine as far as the lights go for a bit but then goes wacko again. Normally after restarting the hummer.

I have checked grounds at the battery and cleaned battery terminals and still no luck.

How did you reset the BCM?

Have you read "P", "B", and "U" codes?

I guess it'* really not a BCM reset it'* more of a passlock bypass. Disconnected the battery for 30 minutes hook that backup. Did turn the key cook the starter let it sit and run for 10 minutes but not running of course. Then shut off counted ten seconds repeated the process two more times. I do not know if my ODB reader will read those c
odes I have not data I thought and ODB only reads check engine codes am I wrong? If it will read those codes I'll hook it up tonight.

A code reader or simple scan tool can only read "P", or Powertrain codes...

A high end scan tool like a GM Tech II, can read every code there is.....

And then, you need access to trouble trees for all the codes you find, and wiring diagrams, etc....

An electrical problem like this, has to be taken to a professional, who knows what he is doing....preferably a GM guy......

But today, that is like trying to find a good doctor.....every big GM dealership has at least one good diagnostician......you have to ask for that guy to personally work on your vehicle, otherwise anybody could be told to work on your vehicle......

Have you figured out the issue. Mine is doing all the same things and csnt figure it out!

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What carfixer007 said.

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